Physics Test Review Test Tuesday

Newton’s 1 st Law of Motion 1. An object at rest will remain at rest, and an object in motion will remain in motion until acted upon by an. 2. Also known as. UnbalancedForce Inertia

Newton’s 2nd Law of Motion 2. Force = × massacceleration

Newton’s 3rd Law of Motion Every action has an and reaction. equal opposite

Forces Forces act on matter to change its position and create. Any or is a force. Unit of force =. is a force which will slow down or stop an object. force pulls everything to the center of the Earth. motion pushpull Newton Friction Gravitational

Forces Weight is measured on a. Mass is measured on a. Where would you weigh the least amount? – Moon – Earth balance scale

Forces An object falls due to. Gravity will cause the mass of a falling object to. If dropped, which would hit the ground first? – Bowling ball – Baseball gravity accelerate Both would hit at the same time.

Forces Force = ×massacceleration MA F Force is measured in Newtons.

Force = Mass × Acceleration Acceleration is the rate of change in an object’s velocity. Object speeds up = Object slows down = Unit for acceleration =. acceleration deceleration m/s²

Speed Speed = /distance time ST D Speed is measured in m/s.

Work Work = ×Forcedistance Fd W Work is measured in Joules.

Practice Problems If sound travels at a speed of 330 m/s, how long would it take you to hear thunder 1,750 meters away? 330 m/s 1,750 meters  What information do you know? Speed = 330 m/s Distance = 1,750 meters  Which equation should you use?Speed= Distance / Time

Practice Problems If a force of 3000 N can move a crate at an acceleration of 1.5 m/s2, what is the mass of the object? 3000 N 1.5 m/s²  What information do you know? Force = 3000 N Acceleration = 1.5 m/s²  Which equation should you use?Force= Mass × Acceleration

Practice Problems How much work does an elephant do while moving a circus wagon 20 meters will a pulling force of 200 N? 20 meters 200 N  What information do you know? Force = 200 N Distance = 200 N  Which equation should you use?Work= Force × Distance

Distance-Time Graphs Where was the runner at rest? Where was the runner’s speed the fastest? 0-1 seconds, 3-4 seconds 1-2 seconds

Height of Ramp Length of Ramp Mass of Marble Average Distance Marble Rolled 2 cm88 cm1g188 cm 4 cm88 cm1g376 cm 8 cm88 cm1g752 cm 16 cm88 cm1g1504 cm What a blast lab data chart What would be the initial problem for this investigation? At which point would the marble have potential energy? What would the independent variable be in this investigation? What would the dependent variable be in this investigation? What would the control variables be in this investigation? How will the height of the ramp affect how far the marble will roll? At the top of the ramp Ramp height Distance marble rolled Length of ramp, mass of marble

Newton’s Laws of Motion You hit the cue ball into eight ball to win a pool game. Professional baseball players use wooden bats with more mass than aluminum bats with less mass. Exploding fuel in a rocket ship propels the rocket into space. It is easier to push a car in neutral than a bus in neutral. 1 st Law of Motion 2nd Law of Motion 3rd Law of Motion

Practice Problems Amanda, a student in science class, walked backwards with an average speed of 3 m/s. If she completed her walk in 15 seconds, what was the total distance she traveled in meters?

Practice Problems You are moving a dresser that has a mass of 36 kg. Its acceleration is 0.5 m/s2. What is the force being applied?

Practice Problems You drive a total of 600 km in 12 hours. On average, how fast were you driving?

Practice Problems If 450 J of work is done to push a toy truck up the driveway 15 meters, how much force are you applying to the toy truck?